Much like ICE vehicles, gradually accelerating reduces energy consumption compared to flooring the accelerator.
The same is true for when lowering speed. A gradual deceleration is kinder on both your brakes and your battery consumption.
The American Automobile Association (AAA) conducted a test on electric vehicles and their range in the colder weather. They found that, on average, an ambient temperature of 20°F (6.66°C) resulted in a 12% decrease of driving range compared to 70°F (23.8°C).